I just had a look at the Admissions information for Fortismere (www.haringey.gov.uk/fortismere_-_determined_admission_arrangements_2010.pdf) and the MAT consists of a multiple choice test lasting up to 40 minutes. There will be 60 questions in total in four sections: pitch, rhythm, texture and melody.
This sounds like the standard 60-question MAT that is used for State Secondary School Admission, so I have included the information here.
I spend a lot of time with my students in the run-up to the MAT priming them to answer these kinds of questions, so do get their teacher to spend some time giving them sample questions as below. I hope this is of help to you:
The Musical Aptitude Test, played on a CD, is a multiple choice paper consisting of 60 questions which will be divided into 4 sections covering the following areas:-
Pitch: For these questions candidates listen to 2 sounds and have to indicate whether the second sound is the same as the first, or whether it is higher or lower. There are 20 of these questions and some of the pitches are less than a semitone apart.
Melody: For these questions candidates listen to 2 tunes consisting of 5 notes. Candidates have to decide whether the second tune is the same as the first or if one of the notes has been altered. If there is a change, candidates will be expected to identify which note has been altered by giving the note number. There are 10 questions.
Texture: For these questions candidates listen to a number of notes played together at the same time. Candidates need to decide whether or not each chord has 2, 3 or 4 notes. There are 20 questions.
Rhythm: For these questions candidates listen to 2 patterns of notes and have to decide whether the second pattern is the same as or different to the first. Each rhythm will be 4 beats in length. There are 10 questions.